One vertex per element, one color per generator, with an edge from x to x·s.
(9,10)(11,16)(12,15)(13,14)(17,18)(19,23)(20,21)(22,24)(25,29)(26,27)(28,30)(31,32) involution — undirected(1,2,5,8)(3,4,7,6)(9,10,14,13)(11,15,12,16)(17,19,22,28)(18,23,24,30)(20,26,25,31)(21,27,29,32)(1,3)(2,6)(4,8)(5,7)(9,10,14,13)(11,16,12,15)(18,24)(20,25)(23,30)(26,31)(9,11,14,12)(10,15,13,16)(17,20,22,25)(18,21,24,29)(19,26,28,31)(23,27,30,32)(1,3)(2,4)(5,7)(6,8)(9,12,14,11)(10,15,13,16)(17,19)(18,23)(20,26)(21,27)(22,28)(24,30)(25,31)(29,32)(1,4)(2,7)(3,8)(5,6)(9,13,14,10)(11,16,12,15)(17,21)(18,25)(19,27)(20,24)(22,29)(23,31)(26,30)(28,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.